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<DIV><SPAN class=202301321-10102006><FONT face=Arial color=#0000ff
size=2>Nechybí tam někde nějaké diody v tom schématu ?</FONT></SPAN></DIV>
<DIV><SPAN class=202301321-10102006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=202301321-10102006><FONT face=Arial color=#0000ff size=2>Zdraví
PavelK</FONT></SPAN></DIV>
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<DIV class=OutlookMessageHeader lang=cs dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> hw-list-bounces@list.hw.cz
[mailto:hw-list-bounces@list.hw.cz] <B>On Behalf Of </B>Venca
Smidl<BR><B>Sent:</B> Tuesday, October 10, 2006 11:07 PM<BR><B>To:</B>
HW-news<BR><B>Subject:</B> Re: H-bridge - problemy<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Pro objasneni prikladam schema....</FONT></DIV>
<DIV><FONT face=Arial size=2>DS k budicum tc4422 je zde: <A
href="http://ww1.microchip.com/downloads/en/DeviceDoc/21420d.pdf">http://ww1.microchip.com/downloads/en/DeviceDoc/21420d.pdf</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Pokud sepnu T1+T4, pockam (treba 1s), odpojim
T1+T4, sepnu T3+T2,pockam. Pokud to necham takto spinat v nekonecne smycce, po
kratke dobe spolehlive jeden z T1 nebo T3 odejde.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=danhard@volny.cz href="mailto:danhard@volny.cz">Danhard</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=hw-list@list.hw.cz
href="mailto:hw-list@list.hw.cz">HW-news</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, October 10, 2006 7:21
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: H-bridge - problemy</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Jak budite horni tranzistory N/N
polomustku napajeneho 9V z low-side budice napajeneho 10V ??</FONT></DIV>
<DIV><FONT face=Arial size=2>Danhard</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV><FONT face=Arial size=2>Zdravim,</FONT></DIV>
<DIV><FONT face=Arial size=2> zapojil jsem si
H-mustek pro ovladani bldc motoru (na univerzalni desce). Tedy 3 vetve po
2 tranzistorech (N-mosfet). "Silove"-spinane napeti je 9V, tranzistory
otviram 10V na gate, o buzeni se staraji budice TC4421. Horni tranzistory
jsou ovladany pwm, dolni mohou byt jen sepnuty nebo
rozepnuty.</FONT></DIV>
<DIV><FONT face=Arial size=2> Pokud ridici program sepne
prislusnou dvojici Ta nic vic nedela, vse funguje v poradku - je mozne
merit max. proud kolem 10A, s mnenici se stridou PWM proud prislusne klesa
(T se zacnou zahrivat,ale to bude normalni). OVSEM v okamziku, kdy
zacnu periodicky prepinat mezi dvemi dvojicemi tranzistoru, okamzite se
jeden z tranzistoru zahreje a "shori". Pripada mi, jako by se T
rozkmitaly.</FONT></DIV>
<DIV><FONT face=Arial size=2> Chci se tedy zeptat, v cem muze byt
problem? Zda je to bezna chyba z duvodu, ze jsem neco opomel
(nejake "specialni" blokovaci kondenzatory, nejake netypicke
programove rizerni, nejaka konstrukcni zalezitost........)? Jak to
zapojit/ridit aby to chodilo:))?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>predem dekuji</FONT></DIV>
<DIV><FONT face=Arial size=2>Smidl</FONT></DIV></BLOCKQUOTE>
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